I have an “optimus” laptop (haswell iGP and nvidia 740M GPU) running Gentoo with kernel 4.19.37 and nvidia driver 430.14 where X server works through PRIME (XrandR offloading as per Chapter 33. Offloading Graphics Display with RandR 1.4 )
Until recently everything was just fine, but after some recent update X server started to crash:
[ 14.575] (II) Initializing extension NV-CONTROL
[ 14.832] (II) modeset(G0): Damage tracking initialized
[ 14.837] (EE)
[ 14.837] (EE) Backtrace:
[ 14.842] (EE) 0: /usr/bin/X (xorg_backtrace+0x40) [0x560a3b531340]
[ 14.842] (EE) 1: /usr/bin/X (0x560a3b38d000+0x1a7fa9) [0x560a3b534fa9]
[ 14.842] (EE) 2: /lib64/libpthread.so.0 (0x7f708546a000+0x122a0) [0x7f708547c2a0]
[ 14.842] (EE) 3: /lib64/libc.so.6 (memcpy+0x1f) [0x7f708535782f]
[ 14.842] (EE) 4: /usr/lib64/libnvidia-glcore.so.430.14 (0x7f7082469000+0x118a299) [0x7f70835f3299]
[ 14.842] (EE) 5: /usr/lib64/libnvidia-glcore.so.430.14 (0x7f7082469000+0x118a3fd) [0x7f70835f33fd]
[ 14.842] (EE) 6: /usr/lib64/libnvidia-glcore.so.430.14 (0x7f7082469000+0xe73a48) [0x7f70832dca48]
[ 14.842] (EE) 7: /usr/lib64/xorg/modules/extensions/libglxserver_nvidia.so (0x7f708077f000+0x8c2d32) [0x7f7081041d32]
[ 14.842] (EE)
[ 14.842] (EE) Segmentation fault at address 0x7f708113b000
[ 14.842] (EE)
Fatal server error:
[ 14.842] (EE) Caught signal 11 (Segmentation fault). Server aborting
I suspect it started after nvidia driver update, but switching back to old driver doesn’t help.
Rebuilding xorg-server doesn’t help as well…
Full X log is https://pastebin.com/exr7gZLT
xorg.conf is https://pastebin.com/WQc37dCQ